.net

问题 When overriding an OnPaint or OnPaintBackground method in an inheritor of System.Windows.Forms.Control, one argument is always a System.Windows.Forms.PaintEventArgs object. The partial object structure: PaintEventArgs ClipRectangle (System.Drawing.Rectangle) Graphics (System.Drawing.Graphics) Clip (System.Drawing.Region) ClipBounds (System.Drawing.RectangleF) VisibleClipBounds (System.Drawing.RectangleF) Graphics.Clip appears to be a 1-bit map of applicable pixels to influence in subsequent

问题 var rawData = Convert.FromBase64String(_signingKey); var cng = CngKey.Import(rawData, CngKeyBlobFormat.Pkcs8PrivateBlob); I use this code to extract key, from embedded base64 string. It works fine when I test it locally but when I publish on azure I get following exception: WindowsCryptographicException: The system cannot find the file specified (once again I'm not reading from any file) I need this to communicate with apple apns for push notifications, is there any workaround? And this

问题 When overriding an OnPaint or OnPaintBackground method in an inheritor of System.Windows.Forms.Control, one argument is always a System.Windows.Forms.PaintEventArgs object. The partial object structure: PaintEventArgs ClipRectangle (System.Drawing.Rectangle) Graphics (System.Drawing.Graphics) Clip (System.Drawing.Region) ClipBounds (System.Drawing.RectangleF) VisibleClipBounds (System.Drawing.RectangleF) Graphics.Clip appears to be a 1-bit map of applicable pixels to influence in subsequent

问题 var rawData = Convert.FromBase64String(_signingKey); var cng = CngKey.Import(rawData, CngKeyBlobFormat.Pkcs8PrivateBlob); I use this code to extract key, from embedded base64 string. It works fine when I test it locally but when I publish on azure I get following exception: WindowsCryptographicException: The system cannot find the file specified (once again I'm not reading from any file) I need this to communicate with apple apns for push notifications, is there any workaround? And this

问题 I believe the shutdown sequence is as follows (as described here): The MSDN documentation (remarks section) reads: When using a connection-oriented Socket , always call the Shutdown method before closing the Socket . This ensures that all data is sent and received on the connected socket before it is closed. This seems to imply that if I use Shutdown(SocketShutdown.Both) , any data that has not yet been received, may still be consumed. To test this: I continuously send data to the client (via

问题 I believe the shutdown sequence is as follows (as described here): The MSDN documentation (remarks section) reads: When using a connection-oriented Socket , always call the Shutdown method before closing the Socket . This ensures that all data is sent and received on the connected socket before it is closed. This seems to imply that if I use Shutdown(SocketShutdown.Both) , any data that has not yet been received, may still be consumed. To test this: I continuously send data to the client (via

问题 After searching on Stack Overflow questions and some googling, I still not getting it. I'm aware that you can check if a single thread is running with "Thread.isAlive()" method, but I want to check if a particular "FooThread" is still running between all running threads from current process, and if not, call the method that starts it. //somewhere in the code, on another Project/DLL inside solution private void FooThreadCaller() { Action act = () => fooFunction(); Thread t = new Thread(new

问题 In this code fragment: List<String> names = new List<String>(); names.Add("Bruce"); names.Add("Tom"); names.Add("Tim"); names.Add("Richard"); names.ForEach(x => Print(x)); private static string Print(string s) { Console.WriteLine(s); return s; } Print is not an Action for sure since it is returning string ; however x=> Print(x) is, why? 回答1: The type of the lambda expression x => Print(x) is determined based on its context. Since the compiler knows that the lambda is assigned to Action<string

问题 In this code fragment: List<String> names = new List<String>(); names.Add("Bruce"); names.Add("Tom"); names.Add("Tim"); names.Add("Richard"); names.ForEach(x => Print(x)); private static string Print(string s) { Console.WriteLine(s); return s; } Print is not an Action for sure since it is returning string ; however x=> Print(x) is, why? 回答1: The type of the lambda expression x => Print(x) is determined based on its context. Since the compiler knows that the lambda is assigned to Action<string

问题 I am doing some performance/scalability testing of an IIS application that occasionally seems to slow down to a crawl in production. I'm able to reproduce the slowness consistently using NUnit. CPU and Memory do not spike during the testing, or when the slowness occurs in production. My strong suspicion is that the application is suffering from thread starvation, since it does not appear to be CPU, Memory, I/O, or database access that is causing the bottleneck. I do see signs of what appear